Dear all
I would like to run TBSS on the mean diffusivity (MD). I ran tbss_non_FA MD
in the TBSS directory followed by the steps as described below. I got the
following notice of error:
tbss_non_FA MD
using pre-chosen registration target: dw_con_14_fa_FAi
upsampling alternative images into standard space
merging all upsampled MD images into single 4D image
Usage: fslmerge <-x/y/z/t/a> <output> <file1 file2 .......>
-t : concatenate images in time
-x : concatenate images in the x direction
-y : concatenate images in the y direction
-z : concatenate images in the z direction
-a : auto-choose: single slices -> volume, volumes -> 4D (time series)
** ERROR (nifti_image_read): failed to find header file for 'all_MD'
** ERROR: nifti_image_open(all_MD): bad header info
Error: failed to open file all_MD
Cannot open volume all_MD for reading!
projecting all_MD onto mean FA skeleton
...
Following the instructions, I did the TBSS analysis on the FA data, created
a directory called MD in the TBSS analysis directory, copied the MD images
in this directory and gave them the same name as the original FA volumes in
origdata.
It seems that merging all subjects' MD data into a 4D file stats/all_MD
didn't work. Yet it does work if I apply the fslmerge command by itself
(fslmerge -t dti4D_MD wd_* ). So I tried the following command;
tbss_non_FA MD -nofslmerge
getting the same error message as described above.
Thank you very much for your help
Diana
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